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tests: have coins simulation test also use CCoinsViewDB

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Before this change, the coins simulation test uses a base view of type
CCoinsViewTest, which has no relevance outside of the unittest suite. Might as
well reuse this testcase with a more realistic configuration that has
CCoinsViewDB at the bottom of the view structure.
This commit is contained in:
James O'Beirne 2019-12-04 16:38:30 -05:00
parent e354db7877
commit bee88b8c58
1 changed files with 21 additions and 4 deletions
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25
src/test/coins_tests.cpp
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@ -8,6 +8,7 @@
#include <script/standard.h>
#include <streams.h>
#include <test/util/setup_common.h>
#include <txdb.h>
#include <uint256.h>
#include <undo.h>
#include <util/strencodings.h>
@ -109,7 +110,12 @@ static const unsigned int NUM_SIMULATION_ITERATIONS = 40000;
//
// During the process, booleans are kept to make sure that the randomized
// operation hits all branches.
BOOST_AUTO_TEST_CASE(coins_cache_simulation_test)
//
// If fake_best_block is true, assign a random uint256 to mock the recording
// of best block on flush. This is necessary when using CCoinsViewDB as the base,
// otherwise we'll hit an assertion in BatchWrite.
//
void SimulationTest(CCoinsView* base, bool fake_best_block)
{
// Various coverage trackers.
bool removed_all_caches = false;
@ -126,9 +132,8 @@ BOOST_AUTO_TEST_CASE(coins_cache_simulation_test)
std::map<COutPoint, Coin> result;
// The cache stack.
CCoinsViewTest base; // A CCoinsViewTest at the bottom.
std::vector<CCoinsViewCacheTest*> stack; // A stack of CCoinsViewCaches on top.
stack.push_back(new CCoinsViewCacheTest(&base)); // Start with one cache.
stack.push_back(new CCoinsViewCacheTest(base)); // Start with one cache.
// Use a limited set of random transaction ids, so we do test overwriting entries.
std::vector<uint256> txids;
@ -211,6 +216,7 @@ BOOST_AUTO_TEST_CASE(coins_cache_simulation_test)
// Every 100 iterations, flush an intermediate cache
if (stack.size() > 1 && InsecureRandBool() == 0) {
unsigned int flushIndex = InsecureRandRange(stack.size() - 1);
if (fake_best_block) stack[flushIndex]->SetBestBlock(InsecureRand256());
BOOST_CHECK(stack[flushIndex]->Flush());
}
}
@ -218,13 +224,14 @@ BOOST_AUTO_TEST_CASE(coins_cache_simulation_test)
// Every 100 iterations, change the cache stack.
if (stack.size() > 0 && InsecureRandBool() == 0) {
//Remove the top cache
if (fake_best_block) stack.back()->SetBestBlock(InsecureRand256());
BOOST_CHECK(stack.back()->Flush());
delete stack.back();
stack.pop_back();
}
if (stack.size() == 0 || (stack.size() < 4 && InsecureRandBool())) {
//Add a new cache
CCoinsView* tip = &base;
CCoinsView* tip = base;
if (stack.size() > 0) {
tip = stack.back();
} else {
@ -256,6 +263,16 @@ BOOST_AUTO_TEST_CASE(coins_cache_simulation_test)
BOOST_CHECK(uncached_an_entry);
}
// Run the above simulation for multiple base types.
BOOST_AUTO_TEST_CASE(coins_cache_simulation_test)
{
CCoinsViewTest base;
SimulationTest(&base, false);
CCoinsViewDB db_base{"test", /*nCacheSize*/ 1 << 23, /*fMemory*/ true, /*fWipe*/ false};
SimulationTest(&db_base, true);
}
// Store of all necessary tx and undo data for next test
typedef std::map<COutPoint, std::tuple<CTransaction,CTxUndo,Coin>> UtxoData;
UtxoData utxoData;